Heat-exchange coil



ay 14, 1929. J. sTRlNDLUND HEAT EXCHANGE COIL Filed May 5, 1927 f ngunnnn-U uugqoool vvv [ guaaunv uonal luunaan one.,

Emo F Patented May 14, 1929.

UNITED STATES PATENT OFFICE.

JOHN STRINDLUND, OF TOFTE IN HURUM, NORWAY, ASSIGNOR TO G. D. JENSSEN COM- PANY, OF NEW YORK, N. Y.

HEAT-EXCHANGE COIL.

Application led May 5,

The invention relates to a heat exhange coil, as described in the present specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially of the novel features of construction pointed out in the claim for novelty following a description containing an explanation in detail of an acceptable form of the invention.

The objects of the invention are to maintain the coils in rigid relation to one another, without in any way affecting the efficiency of the cooling or heating systems in Which the coil is employed; to insure uniformity in the interchange of temperatures; to accomplish the aforesaid purposes in a simple and economical manner; to eliminate distortion in the coil structure and establish it more effectually as a unitary construction; to furnish to the trade a device particularly effective as a gas cooler; and generally to provide in the production of pulp and other manufactures a coil of considerable strength and consequently of great durability at a moderate cost to the consumer.

In the drawings, Figure 1 is a vertical sectional view of the container showing the coil and supporting spiral web.

Figure 2 is an enlarged cross sectional View of adjacent coils showing the spacing and supporting web.

Like numerals of reference indicate corresponding parts in the various figures.

Referring to the drawings, the coil herein illustrated represents the type of coil used as a gas cooler in sulphite pulp plants and is enclosed in the water container 11 having the inlet 12 for the gas feed pipe 13 and the outlet 14 for the gas discharge pipe 15 from the coil.

rlhe coil 1() is formed with the spiral web 16 having the water holes 17 throughout its 1927. Serial No. 189,144.

length forming a spiral row of holes, in other words, the web 16, which in lead pipe construction is integral with the coil tubes,

is perforated with orifices from end to end,

thus permitting the water in the container 11 to rise from the inlet 18 and freely circulate externally and internally of the coil structure. The numeral 19 indicates a drain pipe through the side wall adjacent to the bottom of the container.

This web insures efficient operation particularly in gas coolers as the water must maintain its level continuously during its rise, therefore each twist of the coil is surrounded with water as it becomes submerged, because the various water holes allow its passage through the webs, which for that reason form no barrier to the cooling fluid and at the same time hold up the coils, so that there is no external communication between the twists and therefore no exchange of heat and cold.

rIhis coil construction is also applicable in other industrial pursuits and will be found useful as a heating element as well as a cooling device.

lVhat I claim is In a heat exchange coil, a casing having a fluid inlet and a fluid outlet, and a vessel of cylindrical shape having its bottom resting on the bottom of said casing and its walls rising upwardly from the vessel bottom and pierced by a spiral row of perforations alternating with a spiral tubular passage forming a coil and having its inlet formed by a riser pipe extending through the aforesaid inlet and its discharge by a downward extension from the lower en d.

Signed at Oslo, Norway, this 10th day of March, 1927.

JOHN STRINDLUND. 

